connection failed due to exception:error code 11001

Hi
I am trying to run this sample code given along with ELDOS(simple sftp), the problem i am facing is after entering the user name and password, its giving an error as(private key could not be loaded : error 3330 and connection failed due to exception:error 11001),since i did not need any encryption i removed the private key part from the code, but the another error still exist i.e connection failed due to exception:error 11001

Can you plz help me out here, if the private key use is compulsory then i dont have an private key, so plz let me know how to create 1 and what is the password for it.

Ya i am not using that function, as i told before i have removed that functionality, but the problem i am facing now is (connection failed due to exception:error 11001) what should i have to do for this....